M2pW#gEN is a tool for generating Magento 2 password hashes. It's based on the Magento Encryptor and runs client-side using MD5 and SHA256 hash algorithms from jshashes library.
This tool can be useful if you need to set a user password outside the Magento Framework.
Here is an example how to update a customer password with a raw MySQL query:
update customer_entity set password_hash = '%hash%' where email = '%email%';